These Apollo command module cufflinks are part of a commemorative set that includes a matching tie-tack belonging to NASA astronaut Michael Collins. On July 20, 1969, astronauts Neil Armstrong and Edwin "Buzz" Aldrin became the first human beings to walk on the lunar surface while Collins orbited the Moon in the Apollo 11 command module.
When Collins became the director of the National Air and Space Museum, he loaned these cufflinks to the Museum for display in the "Apollo to the Moon" gallery. He gave the cufflinks and tie tac to the National Collection as permanent donations in 1984.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.